There were extra police on hand at Valley View Middle School in Pleasant Hill on Tuesday after the FBI acted on a school shooting threat that was posted on Snapchat last week.

Last Friday, an online threat to shoot up the school on the last day was posted over the picture of an actress with an anti-gay slur and 30 gun emojis. Sgt Brian Leonard with the Pleasant Hill Police Department said, "There was a conversation between two juveniles. That conversation was reported to Snapchat and Snapchat was concerned about the content of that conversation and they alerted the FBI."

Based on the IP address, the FBI contacted Concord police. The threatened school is in Pleasant Hill, but the 13-year-old who allegedly wrote the threat was arrested Friday night at his home in Martinez. Guns were confiscated, police say.

Sgt Leonard said when he was arrested, "It was downplayed somewhat. He made mention that he wasn't serious about the threats but obviously in this day and age you can't take threats lightly."